Mechanical Properties of Steels for Cold-Formed Steel Structures at Elevated Temperatures

Table 9

Recommendation retention factors for the yield strength.

T (°C)		20	100	200	300	400	500	600	700	800
Full annealed steels		1.000	0.946	0.876	0.751	0.575	0.385	0.229	0.138	0.095
Stress relieving annealed steels		1.000	0.98	0.986	0.925	0.731	0.415	0.104	0.065	0.042